高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (4): 626.

• 研究简报 • 上一篇    下一篇

盐酸二乙胺与己二酸、癸二酸的相关系

廖复辉, 高苏, 张启运   

  1. 北京大学化学系与分子工程学院, 北京 100871
  • 收稿日期:1999-03-27 出版日期:2000-04-24 发布日期:2000-04-24
  • 通讯作者: 廖复辉(1962年出生),女,工程师,从事无机化学方面的研究.
  • 基金资助:

    北京市自然科学基金(批准号:2982017)

Phase Relations and Decomposition for Systems of Diethylamine Hydrochloride-Adipic Acid and Diethylamine Hydrochloride-Sebacic Acid

LIAO Fu-Hui, GAO Su, ZHANG Qi-Yun    

  1. College of Chemical and Molecular Engineering, Peking University, Beijing 100871, China
  • Received:1999-03-27 Online:2000-04-24 Published:2000-04-24

关键词: 钎焊, 盐酸二乙胺, 己二酸, 葵二酸, 差热分析, 相图

Abstract: Phase diagrams and decomposition for systems of (C2H5)2NH·HCl C6H10 O4 (adipic acid) and (C2H5)2NH·HCl-C10 H18 O4 (sebacic acid) have been investigated by DTA, DSCand visual polythermal methods. Both two systems are of the simple eutectic type. Eutectics are located in 50% of C6H10 O4 at 94 ℃ and 55% of C10 H18 O4 at 106 ℃ respectively. (C2H5)2NH·HCl melts at 217 ℃ and decomposes as soon as it just melted. Apolymorphic reaction of (C2H5)2NH·HCl occurs at 98 ℃, the transition heat is 29.7 J/g. Experiments also revealed that adipic acid melts at 152.8—155.7 ℃ with melting heat 199.1 J/g, decomposes at 250.8—263.0 ℃ with decomposition heat 174.2 J/g; sebacic acid melts at 133.1—135.9 ℃ with melting heat 199.8 J/g and decomposes at 233.2—269.2 ℃, but no exact value of decomposition heat has been determined.

Key words: Soldering, Diethylamine hydrochloride, Adipic acid, Sebacic acid, DTA, Phase diagram

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